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Question

An alkaline earth metal, element M, reacts with oxygen. What is going to be the general formula for the compound formed?

A
M2O
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B
MO
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C
MO2
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D
M2O3
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E
M3O2
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Solution

The correct option is A MO
An alkaline earth metal, element M, reacts with oxygen. The general formula for the compound formed will be MO. Both M and O are bivalent. The alkaline earth metal has +2 oxidation state and the oxide ion has -2 oxidation state.

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